What Ice Maker Not Making Ice / "01 21 _F" means (miele refrigerator ice maker not working)
When a miele refrigerator ice maker not working is the issue, it is an observable condition — no ice is produced. On older Miele KF/F units the display may flash the coded ice-maker indicator “01 21 _F”, which is the one fridge-side code Miele uses for this; it usually traces to the water supply, filter, or ice-maker module.
Symptoms to look for
The signs below help confirm you are dealing with this condition rather than a different fault on your Miele Refrigerator. You may see one of them or several together, and they can build up gradually or appear suddenly after a power event, a long door opening, a spill, or recent service.
- No ice or very little ice is produced
- Older KF/F units may flash “01 21 _F”
- The ice maker may be switched off or paused
- Water may not be reaching the ice maker
Common causes
Several different faults can produce these symptoms. Working through the most likely causes in order helps separate a quick, owner-level check from a problem that needs trained service and the correct Miele parts.
- Ice maker turned off — the function is paused or disabled
- Water supply or filter issue — a closed valve or clogged filter
- Frozen fill tube — the inlet line is iced up
- Ice-maker module fault — the unit does not cycle
Troubleshooting steps you can try
Work through these checks in order before calling for service. Stop wherever you are unsure, or where high-voltage parts, gas, the sealed refrigeration system, or a heat-pump compressor are involved, and hand the rest to a qualified technician.
- Confirm the ice maker is switched on and the bin is seated.
- Check the water supply valve is open and replace an overdue water filter.
- Give a newly connected ice maker up to 24 hours to produce ice.
- If “01 21 _F” shows or no ice comes with water connected, book service.
Parts a technician may replace
Depending on what the diagnosis shows, a technician may inspect, test, or replace the ice maker module, water inlet valve, water filter, and supply line. The correct part for your Miele Refrigerator is matched from the model and serial number, and genuine Miele components are fitted through trusted parts suppliers rather than generic substitutes so that performance, safety, and the appliance’s long working life are all protected. Confirming the failed part before ordering avoids replacing more than the fault actually requires.
When to call a technician
An ice maker that produces none with water connected, or shows “01 21 _F”, needs a technician to test the module, inlet valve, and supply. When the fix calls for trained service, book a visit through our scheduling page and an experienced, qualified technician will diagnose and repair it.
Prevention and care
Regular care keeps this condition from returning on your Miele Refrigerator. Keep filters, vents, seals, and the condenser, exhaust, or burner path clean, avoid overloading or blocking airflow, check that doors and seals close cleanly, and follow the Miele maintenance guidance for your model. Note when the symptom first appeared and what changed around the same time — a recent load, a warm room, a power event, a spill, or recent service — because that detail often points a technician straight to the cause and keeps the repair simple.
Related help and Miele resources
Browse other Miele Refrigerator diagnostics, read about Miele Refrigerator repair, look up your unit in the Miele models reference, or the related not cooling / check demo mode, or schedule a service visit. For Miele manufacturer documentation and model lookup, visit the manufacturer at mieleusa.com.
